M'migodi ya placer, golide amapezedwanso ndi kulekanitsa mphamvu yokoka, chifukwa cha migodi ya miyala yolimba, njira zina zimagwiritsidwa ntchito.Mapampu opangira mphira nthawi zambiri amagwiritsidwa ntchito pokonza migodi ya golide, ndi choyikapo mphira cha volute liner ndi choyikapo mphira.
Nthawi yotumiza: Jul-13-2021